scholarly journals Virtual reassembly and completion of a fragmentary drinking vessel

2016 ◽  
Vol 7 (15) ◽  
pp. 67 ◽  
Author(s):  
Despoina Tsiafaki ◽  
Anestis Koutsoudis ◽  
Fotis Arnaoutoglou ◽  
Natasa Michailidou
Keyword(s):  
Essential Role ◽  
Collection System ◽  
Ancient Greek ◽  
Automated Data Collection ◽  
The Past ◽  
System A ◽  
Geometrical Features ◽  
And Function ◽  
3D Digitisation

<p class="VARAbstract">A  key  issue  in  the  study  of  cultural  assets  is theiroften  fragmentary  condition.  This  causes  serious  problems  and questions regarding theirstudy and presentation. Pottery fragments are the most numerous findings in every excavation. Furthermore, pottery plays an essential role for the reconstruction of the past, since it providesinformation for all aspects of  life  (private,  public,  religion,  death,  economy,  society,  trade,etc.). Therefore,a  thorough  study  and  presentation  of pottery fragments contribute to a better knowledge of the past.The focus of this work is the visualisation of an ancient Greek  drinking  vase,  a kantharos,  which  was  unearthed  during  the  excavations  at  the  settlement  of  Karabournaki (ancient Therme) in the area of Thessaloniki (Greece). It dates to the Archaic period (7th-6thc. B.C.) and it was found in fragments  among  the  settlement's  architectural  remains.  The  vase  is  of  great  archaeological  significance  due  to  its peculiarities  in  terms  of  shape,  decoration  and  function. Therefore,its  digital  completion  and  3D  reconstruction  willcontribute to its betterstudy and scholarly publication along with a general contribution to the field of pottery studies.We discuss  on  the  3D  digitisation  of  the kantharosfragments  that  werebased  onStructure from Motion/Multiple  View Stereovision  (SfM/MVS)  and  a  custom  automated  data  collection  system.  A  detailed  description  of  the  digitisation pipeline is given along with details related to the quality of the 3D digital replicas of the sherds. Furthermore, we presentour  manual  virtual  reassembly  and  reconstruction  pipelineof  the kantharosby  describing  the  challenges,  issues  and ambiguities discovered while analysing the geometrical features of each sherd. A number of photorealistic reconstruction visualisations  of  the  artefact  are  presented  in  order  to  question  the  applicability  of  the  solution  for  the  actual reconstruction</p>

scholarly journals The Role of Adrenoceptors in the Retina

Cells ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2594
Author(s):  
Yue Ruan ◽  
Tobias Böhmer ◽  
Subao Jiang ◽  
Adrian Gericke
Keyword(s):  
Visual Information ◽  
Vision Loss ◽  
Retinal Diseases ◽  
System A ◽  
The Central Nervous System ◽  
The Individual ◽  
And Function ◽  
The Brain

The retina is a part of the central nervous system, a thin multilayer with neuronal lamination, responsible for detecting, preprocessing, and sending visual information to the brain. Many retinal diseases are characterized by hemodynamic perturbations and neurodegeneration leading to vision loss and reduced quality of life. Since catecholamines and respective bindings sites have been characterized in the retina, we systematically reviewed the literature with regard to retinal expression, distribution and function of alpha1 (α1)-, alpha2 (α2)-, and beta (β)-adrenoceptors (ARs). Moreover, we discuss the role of the individual adrenoceptors as targets for the treatment of retinal diseases.

Joint programmes in paediatric cardiothoracic surgery: a survey and descriptive analysis

2011 ◽  
Vol 21 (S2) ◽  
pp. 159-164 ◽  
Author(s):  
William M. DeCampli
Keyword(s):  
Online Survey ◽  
Descriptive Analysis ◽  
The United States ◽  
The Past ◽  
Perceived Success ◽  
Primary Hospital ◽  
Primary Institutions ◽  
Cardiac Surgeons ◽  
And Function

AbstractBackgroundJoint programmes, as opposed to regionalisation of paediatric cardiac care, may improve outcomes while preserving accessibility. We determined the prevalence and nature of joint programmes.MethodsWe sent an online survey to 125 paediatric cardiac surgeons in the United States in November, 2009 querying the past or present existence of a joint programme, its mission, structure, function, and perceived success.ResultsA total of 65 surgeon responses from 65 institutions met the criteria for inclusion. Of the 65 institutions, 22 currently or previously conducted a joint programme. Compared with primary institutions, partner institutions were less often children's hospitals (p = 0.0004), had fewer paediatric beds (p = 0.005), and performed fewer cardiac cases (p = 0.03). Approximately 47% of partner hospitals performed fewer than 50 cases per year. The median distance range between hospitals was 41–60 miles, ranging from 5 to 1000 miles. Approximately 54% of partner hospitals had no surgeon working primarily on-site, and 31% of the programmes conducted joint conferences. Approximately 67% of the programmes limited the complexity of cases at the partner hospital, and 83% of the programmes had formal contracts between hospitals. Of the six programmes whose main mission was to increase referrals to the primary hospital, three were felt to have failed. Of the nine programmes whose mission was to increase regional quality, eight were felt to be successful.ConclusionJoint programmes in paediatric cardiac surgery are common but are heterogeneous in structure and function. Programmes whose mission is to improve the quality of regional care seem more likely to succeed. Joint programmes may be a practical alternative to regionalisation to achieve better outcomes.

scholarly journals A Comprehensive Review on Multiband Reconfigurable Antenna

2021 ◽  
pp. 377-388
Author(s):  
Preeti Rani ◽  
◽  
Tejbir Singh ◽  
Meenu Kaushik ◽  
Vishant Gahlaut
Keyword(s):  
Wireless Communication ◽  
High Performance ◽  
Wireless System ◽  
The Past ◽  
Multiband Antennas ◽  
Single Antenna ◽  
Interference Level ◽  
System A ◽  
New Generation

The advancement of wireless communication is markedly accountable from the past two decades. A variety of designs and techniques have been established in the domain of reconfigurable multiband antennas for different wireless services. Now a days, a high quality of communication with reduced size is required for new generation wireless system. A multiband reconfigurable functionality offers a flexible and high-performance design by single antenna only. A brief review on multiband antenna with different reconfigurable techniques is presented in this paper. Moreover, the new possibilities for future wireless communication system have been demonstrated. A reconfigurable system along with minimal interference level over the fixed or non-reconfigurable transceivers has been discussed in detail.

scholarly journals An Overview of the Reliability Analysis Methods of Tunneling Equipment

2020 ◽  
Vol 14 (1) ◽  
pp. 218-229
Author(s):  
Sina Ahmadi ◽  
Mohsen Hajihassani ◽  
S. Moosazadeh ◽  
H. Moomivand
Keyword(s):  
Reliability Analysis ◽  
Labor Costs ◽  
Goods And Services ◽  
The Past ◽  
Negative Results ◽  
System A ◽  
Equipment Reliability ◽  
Tree Methods ◽  
The Cost

The absolute prevention of damage occurrence is not possible, thus reducing the probability of failure in a system and its impact is very important regarding the operation of a whole system. A failure in a system or in its subsystems makes negative results such as the stop in the production process, rising labor costs, and increasing the cost of maintenance. Reliability, in recent years, is mentioned as one of the most significant aspects of the quality of goods and services. In the past, reliability concerned sensitive and complex industries such as military, nuclear, and aerospace where the lack of their reliability could cause irreparable damage to the entire system. However, today it has become a universal concern. Tunneling equipment has grown in size and complexity and therefore, lack of reliability may cause massive costs to this equipment. Therefore, reliability determination in order to identify the components and subsystems with low reliability is essential. The aim of this study is to review the methods of tunneling equipment reliability analysis including statistical analysis, failure mode and effects analysis, Markov and fault tree methods. In addition, previous available research on the reliability analysis of tunneling equipment is presented.

scholarly journals 'From Asia with Love'

1970 ◽  
Vol 57 ◽  
pp. 169-185
Author(s):  
Koen De Temmerman
Keyword(s):  
Literary Theory ◽  
Contemporary Society ◽  
Ancient Greek ◽  
The Past ◽  
And Function ◽  
Greek Novel

This paper deals with the highly debated question of the meaning of theancient Greek novel in its contemporary society. In research of the past decades,two main approaches have been used to tackle this issue but they both leadto a deadlock. That is why this paper proposes a literary-theoretical approachto the problem. Based on the notion - formulated in modern literary theory- that literature can be regarded as a form of cognition, it argues that andclarifies the ways in which the ancient Greek novel probably had a specificmeaning and function in the first centuries A.D.

scholarly journals Recovery of valuable incompletely recorded CN tower lightning return stroke current derivative signals

2021 ◽  
Author(s):  
Lakmini Perera
Keyword(s):  
Essential Role ◽  
Time Derivative ◽  
Natural Phenomenon ◽  
Return Stroke ◽  
The Past ◽  
Safety Regulations ◽  
The Many ◽  
Current Derivative

Lightning is a captivating natural phenomenon but indisputably terrifying. Therefore, lightning studies have played an essential role in establishing safety regulations to protect lives and infrastructures. Among the many simulating functions that were utilized in the past for modelling the lightning return-stroke current, Heidler and Pulse functions overcame certain limitations, including the time derivative discontinuities. Incompletely-recorded current derivative signals represent another challenge in lightning research. This thesis proposes a double-term Pulse function that could be investigated with the double-term Heidler function for modelling the lightning return-stroke current. The time derivative of both Pulse and Heidler functions have been used to simulate the current derivative signals recorded on June 10, 1996. Some of these return-stroke signals exceded the maximum set level. Consequently, the double-term simulating functions were used to recover a large incompletely recorded return-stroke current derivative signal. The R2 fitting factor was used to evaluate the quality of each fitting to determine which simulating function is better suited to model and recover valuable return-stroke current signals.

scholarly journals Organization Development for Improving Public Enterprises

1976 ◽  
Vol 1 (2) ◽  
pp. 27-40
Author(s):  
Nitish R. De
Keyword(s):  
Organization Development ◽  
Public Enterprises ◽  
The West ◽  
The Past ◽  
System A ◽  
The Future ◽  
Effective System ◽  
Appreciative System ◽  
Work And Life

Organization Development with its process focus, as developed in the West, may not be able to deal with several problems of social reality like alienation from work and life, tension ridden culture of consumerism, effects of future shocks, etc. The picture is complicated in developing countries where bureaucratic‐work orientation with concomitant values and attitudes dominate public enterprises. The need for the establishment of an effective system for the continuous rise in the quality of life is quite important in public enterprises. A new culture has to be developed. There is a need to internalize a larger “appreciative system” with OD strategies in terms of the process and design. This may lead to “eco-system,” a meaningful linkage of the past and the future through the present, an ideal-seeking approach to the future. Such an approach may free 00 from its narrow confines.

Designing a Polymer Gear for Use in the Environment of an Internal Combustion Engine

2011 ◽  
Author(s):  
Rod Kleiss ◽  
Frank J. Ferfecki
Keyword(s):  
Combustion Engine ◽  
Material Selection ◽  
Consumer Products ◽  
Balance System ◽  
Gear Design ◽  
The Past ◽  
System A ◽  
Injection Molded

Much has been written about the advances in polymer gearing over the past few years. After fitful starts in toys and consumer products, the design and quality of these gears have improved dramatically. Materials advances over the past 20 years have been significant as well. This paper describes the methodology of designing a net shape PolyEtherEtherKetone (PEEK) injection molded gear for an automotive mass balance system. The case study referenced (ref 1) shows that, when compared to the high quality ground iron gears in the same system, a net shape injection molded PEEK polymer gear provides a 3db noise reduction, as much as 9% reduction in power consumption, a 69% mass reduction and meets the application durability requirements. The paper describes the design of the injection molded gear’s unique tooth profile, material selection, part design, mold design, and inspection methods. The paper focuses on the differences in gear design and inspection methods between injection molded gears and their metal counterparts.

MAST system: a new condensed cardiopulmonary bypass circuit for adult cardiac surgery

Perfusion ◽  
2001 ◽  
Vol 16 (6) ◽  
pp. 447-452 ◽  
Author(s):  
K McCusker ◽  
V Vijay ◽  
W DeBois ◽  
R Helm ◽  
D Sisto
Keyword(s):  
Cardiopulmonary Bypass ◽  
Postoperative Phase ◽  
Operating Table ◽  
The Past ◽  
System A ◽  
Control Console ◽  
Priming Volume ◽  
Prime System ◽  
And Function ◽  
Adult Cardiac Surgery

There have been many refinements in cardiopulmonary bypass (CPB) techniques over the past few decades specific to design, materials and function. Despite these improvements, use of the standard length circuit tubing and pump oxygenator alter cellular, biochemical and rheological properties by inducing a systemic inflammatory response, persisting well into the early postoperative phase. We have designed a new condensed CPB circuit, the MAST system, where the oxygenator and the pumps are brought closer to the operating table (within 30 inches) with the help of a series of telescopic swivel steel poles to which they are attached. The control console is retained at the usual remote location of 2 ft behind the MAST system. This configuration accomplishes a decrease in tubing length, priming volume and blood circulatory time within the extracorporeal circuit. Early experience of a hundred consecutive cases utilizing the MAST CPB system is presented along with a comparative analysis of prime volume, hemodilution and transfusion parameters of MAST system vs the low prime system, which is another newly developed CPB circuit utilizing a pediatric oxygenator to reduce prime volume and hemodilution.

scholarly journals Recovery of valuable incompletely recorded CN tower lightning return stroke current derivative signals

2021 ◽  
Author(s):  
Lakmini Perera
Keyword(s):  
Essential Role ◽  
Time Derivative ◽  
Natural Phenomenon ◽  
Return Stroke ◽  
The Past ◽  
Safety Regulations ◽  
The Many ◽  
Current Derivative

Lightning is a captivating natural phenomenon but indisputably terrifying. Therefore, lightning studies have played an essential role in establishing safety regulations to protect lives and infrastructures. Among the many simulating functions that were utilized in the past for modelling the lightning return-stroke current, Heidler and Pulse functions overcame certain limitations, including the time derivative discontinuities. Incompletely-recorded current derivative signals represent another challenge in lightning research. This thesis proposes a double-term Pulse function that could be investigated with the double-term Heidler function for modelling the lightning return-stroke current. The time derivative of both Pulse and Heidler functions have been used to simulate the current derivative signals recorded on June 10, 1996. Some of these return-stroke signals exceded the maximum set level. Consequently, the double-term simulating functions were used to recover a large incompletely recorded return-stroke current derivative signal. The R2 fitting factor was used to evaluate the quality of each fitting to determine which simulating function is better suited to model and recover valuable return-stroke current signals.

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